Perennials > Petasites > Petasites japonicus > Petasites japonicus var. giganteus
Petasites japonicus
var. giganteus
Giant Japanese Butterbur
Mike's
Opinion
"
I admire the texture and form of this plant but have lived to regret its inclusion in the landscape where it has become a garden thug, even growing under concrete walkways to adjoining planting beds; control, nuclear bombs.
Michael Pascoe, NDP., ODH., CLT., MSc. (Plant Conservation)
"
| Family |
| Asteraceae |
| Genus |
| Petasites |
| Species |
| japonicus |
| Category |
| Perennials |
| Variety |
| giganteus |
| USDA Hardiness Zone |
| 5 - 9 |
| Canadian Hardiness Zone |
| 4a - Requires cool season protection under glass. |
| RHS Hardiness Zone |
| H3 - H7 |
| Temperature (°C) |
| -29 -(-1) |
| Temperature (°F) |
| -20 - 30 |
| Height |
| 120 - 180 cm |
| Spread |
| 90 - 120 cm |
Photographs
Description and Growing Information
Flowering Period
| General Description |
| This plant is a very aggressive spreader and prefers sunny, moist areas. |
| Landscape |
| Use with caution since it can travel quite far in the landscape where conditions are ideal and although ornamental use with extreme caution. |
| Leaf Description |
| This plant has deep green rounded leaves. |
| Notable Specimens |
| The Gardens of Fanshawe College, London, Ontario, Canada. |
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